Additional file 1.

Figure S1. Senescence-associated β-galactosidase staining of rat nucleus pulposus (NP) cells following treatment with TNF-α and IL-1β for 10 days. The result indicates that the number of SA-β-gal-positive NP cells is increased in the experimental (B) versus the control group (A).

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Markova et al. Arthritis Research & Therapy 2013 15:R121   doi:10.1186/ar4301